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Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package mailman  (opens in a new tab)

Threat Intelligence

EPSS
2.29% (81st percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-MAILMAN-567447
  • published24 Apr 2020
  • disclosed24 Apr 2020
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Introduced: 24 Apr 2020

CVE-2020-12137  (opens in a new tab)
CWE-79  (opens in a new tab)

Amendment

The Debian security team deemed this advisory irrelevant for Debian:unstable.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mailman package and not the mailman package as distributed by Debian.

GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.

References